CN116137926A - Fault detection in a spring-loaded drive of a medium-voltage switching device - Google Patents
Fault detection in a spring-loaded drive of a medium-voltage switching device Download PDFInfo
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- CN116137926A CN116137926A CN202180060059.8A CN202180060059A CN116137926A CN 116137926 A CN116137926 A CN 116137926A CN 202180060059 A CN202180060059 A CN 202180060059A CN 116137926 A CN116137926 A CN 116137926A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3005—Charging means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
- H01H2300/052—Controlling, signalling or testing correct functioning of a switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3052—Linear spring motors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a method for operating a spring-loaded drive (30) of a medium-voltage switching device (10), to a spring-loaded drive (30) and to a medium-voltage switching device (10) having such a spring-loaded drive (30). The method according to the invention for operating a spring-loaded drive (30) of a medium-voltage switching device (10) comprises at least the following steps: -measuring a drive current of an electric auxiliary drive (31) for tensioning a drive spring (34) of a spring energy storage drive (30) of the medium voltage device (10); -tensioning the drive spring (34) with an electric auxiliary drive (31); -creating an evaluation data set from the measured drive current; -comparing the evaluation data set with the expectations; and-outputting a maintenance signal depending on the comparison result.
Description
Technical Field
The invention relates to a method for operating a spring-loaded drive of a medium-voltage switching device, to a spring-loaded drive designed to carry out the operating method according to the invention, and to a medium-voltage switching device having such a spring-loaded drive.
Background
The switching operation in a medium-voltage switching device, for example in particular by switching off the switch by moving the moving contact of the switch of the medium-voltage switching device away from its mating contact, generally has to take place within a few milliseconds after receiving the corresponding control signal in order to avoid danger to personnel and materials as much as possible. Thus, spring-loaded drives are used, which retain the energy required for the switching action of the switch, in order to be able to react to the corresponding control signal with as little delay as possible. These spring energy storage drives have one or more springs which are tensioned by an electric auxiliary drive. The tensioning of the spring is generally carried out without a strong requirement for the tensioning speed. The electric auxiliary drive is usually connected to the spring via a transmission or comprises a transmission.
In these spring-loaded drives, faults may occur which adversely affect the switching operation and which must be detected safely and early in the framework of the safety operation management of the medium-voltage switching device in order to prevent the switching faults. The cause of these faults may be a spring-loaded drive, an electric auxiliary drive thereof or a combination of a spring-loaded drive and an electric auxiliary drive.
Possible faults include:
spring fatigue (the energy stored in the spring becomes smaller with time)
The spring becomes stronger (the energy stored in the spring increases with time)
(increased) mechanical retardation in auxiliary drives including transmission mechanisms
Deterioration of the electrical characteristics of the auxiliary drive is accompanied by a reduction in the mechanical power supplied
Overload and the resulting damage to the auxiliary drive, including the transmission
There is currently no method for reliably detecting faults and associating them with individual components of a spring-loaded drive during operation of a medium voltage switchgear. The systems used to date only detect serious deviations, for example lack of operability of the overall arrangement, and can only be carried out within the scope of individual tests. For this purpose, the switch must be disconnected from the medium voltage and a special test device connected.
Against this background, there is a need for a method for operating a spring-loaded drive of a medium-voltage switching device, which method allows fault detection during normal operation of the medium-voltage switching device.
Disclosure of Invention
The method according to the invention for operating a spring-loaded drive of a medium-voltage switching device comprises at least the following steps:
-measuring a drive current of an electric auxiliary drive for tensioning a drive spring of a spring energy storage drive of a medium voltage device;
-tensioning the drive spring with an electric auxiliary drive;
-creating an evaluation data set from the measured drive current;
-comparing the evaluation data set with the expectations; and
-outputting a maintenance signal depending on the comparison result.
The advantage of this method is that during normal operation of the medium voltage switchgear, the status of the spring energy storage drive and the status of its components, such as the spring and the auxiliary drive including the transmission, can be acquired and determined. The output of the maintenance signal allows the maintenance measures to be planned in time before the failure or unacceptable possibility of the spring-loaded drive being disabled and to be carried out in as little time as possible against the adverse effects of the operation supplied or controlled by the medium-voltage switching device and in this way minimizing downtime.
The invention is based on and includes the recognition that the state of the spring energy storage drive can be read from the drive current of the electric auxiliary drive for tensioning the spring. For example, if the auxiliary drive must apply more torque due to an increase in mechanical dullness of the gear train or motor bearings of the auxiliary drive, the drive current increases. However, if the tension of the spring is reduced due to material fatigue through a large number of switching actions, the current will also be reduced. If such a situation is detected, the maintenance signal may indicate this so that the corresponding maintenance measures may be initiated.
Herein, a voltage in the range of 1000 volts to about 52 kilovolts is denoted as medium voltage.
Particularly preferably, in the step of measuring the drive current, the time course of the drive current is measured. The evaluation data record is created in this case from the time course of the measured drive current. From the measurement of the time course of the drive current, a plurality of parameters can be determined and, for example, the reversal effects obtained in the individual measurements, which in each case mean a deterioration of the spring-loaded drive, can be distinguished and detected. As a result of the measurement of the time course of the drive current, it is therefore more likely that a deterioration of the spring-loaded drive is detected in time and that the relevant components of the spring-loaded drive can already be identified before the maintenance measures to be initiated, so that the urgency for executing the maintenance measures can be better evaluated.
For example, the time course may be measured from periodic measurements of the instantaneous current of the electric auxiliary drive. Likewise, it is also possible to make a single measurement at a specific point in time, which single measurement relates to the points of particular interest in the creation of the evaluation data set that actually run. In this case, generally less measurement data are produced to be processed, which simplifies the evaluation and storage. Since these points, or at least some of them, may shift in time based on the deterioration to be observed, it may also be provided that a series of individual measurements is made around these points and that the drive current is not measured or is measured less frequently between these series.
Preferably, in the step of creating the evaluation data set, an integral of the time course of the drive current is determined. The integral of the drive current indicates how much power is used throughout the tensioning process. An increase in this parameter is a very suitable indicator of deterioration of the spring-loaded drive.
Here, a first portion of the integral may be determined, the first portion being indicative of the tensioning work performed by the auxiliary drive. The first part of the integral may in particular refer to a measured time period extending from a local minimum after activation of the auxiliary drive to deactivation of the auxiliary drive. The first part of the integration provides information about whether and how the elasticity of the spring changes over time, which can be reflected in an undesirably reduced movement speed, for example in the case of a spring relaxation, at which movement speed the moving contact of the switch moves during the operation of the switch.
Further, a second portion of the integral may be determined, the second portion being indicative of a drive loss of the auxiliary drive. The second part of the integral may in particular relate to a time section of the measured time course, which extends from the point in time of activating the auxiliary drive to the local minimum mentioned above, and may also relate to a time-course base region which is limited upwards by the current intensity at the local minimum. The second part of the integration provides information as to whether the motor bearings, the transmission and other transducers and transmitters of motor power to the auxiliary drive are sluggish or otherwise deteriorate or change.
In a combination of the latter two embodiments of the method according to the invention, the first part and the second part of the integration may be in a proportional relationship to each other. Thus, a plurality of fault deformations can be read on a single ratio value, which can simplify the step of comparing with the expected one.
Preferably, at least one characteristic point in time is determined when the evaluation data set is created. In the step of comparing the evaluation data set, the at least one characteristic point in time and/or the drive current measured at the at least one characteristic point in time is compared with an expected value, which is associated with the at least one characteristic point in time. The characteristic point in time is determined, for example, with respect to the starting point in time of the activation of the auxiliary motor and represents the point in time at which the desired known characteristic is detectable for a given spring-loaded drive type. For example, the following points in time may be selected as at least one characteristic point in time:
the start of the current through the auxiliary drive,
the start of tensioning the drive spring,
the occurrence of local or global maxima of the drive current,
-a point in time of the auxiliary drive being off
-end of current through the auxiliary drive.
The evaluation data record with which the comparison is intended may be in particular a historical data record or a predefined data record specific to the type of spring-loaded drive. For example, the historical data record may comprise a data record of the same spring energy storage drive during the test tensioning of the spring during the production of the spring energy storage drive, according to the relevant method steps of the method according to the invention, or an evaluation data record when the method according to the invention was previously carried out. The specific data record predefined for the spring-loaded drive type can describe the general behavior of the spring-loaded drive in production dispersion, so that the measures described in the context of the production of the spring-loaded drive are omitted in a time-and cost-saving manner.
A second aspect of the invention relates to a spring-loaded drive for a medium-voltage switching device, comprising an electric auxiliary drive designed for tensioning a drive spring of the spring-loaded drive and a measuring unit designed for measuring a drive current of the auxiliary drive. The measuring unit is furthermore designed to transmit the measurement result for carrying out the method according to the first aspect of the invention to the control unit. The control unit can be realized as a common unit together with the measuring unit or as a separate unit outside the spring-loaded drive, for example in a digital protection device of the medium-voltage installation or in a remote control center.
Another aspect of the invention introduces a medium voltage switchgear having a switch with a moving contact and a spring-loaded actuator according to the previous aspect of the invention, which is designed to move the moving contact of the switch in dependence of a control signal.
Finally, the invention relates to a data memory having a computer program which is implemented by a control unit of a medium-voltage switching device, a digital protection device or a remote control center, for example a control unit of a spring-loaded drive, and which executes the method according to the invention.
Drawings
The invention is explained in more detail below with reference to the drawings of embodiments, in which:
fig. 1 shows an embodiment of a medium voltage switchgear with a spring-loaded drive according to the invention;
fig. 2 shows an example of the time course of the drive current of an electric auxiliary drive of a spring-loaded drive according to the invention; and
fig. 3 shows an exemplary embodiment of a method according to the invention for operating a spring-loaded drive.
Detailed Description
Fig. 1 shows an embodiment of a medium voltage switchgear 10 with a spring-loaded drive 30 according to the invention. The spring-loaded actuator 30 is connected to the moving contact 21 of the switch 20 of the medium-voltage switching device 10 and is designed to move the moving contact 21 rapidly with as little delay as possible to perform a switching action (in particular away from the mating contact 22 during the opening of the switch 20).
For this purpose, the spring-loaded actuator 30 has a drive spring 34, which drive spring 34 maintains the energy required for the desired rapid movement of the moving contact 21 in the tensioned state as spring energy in order to release this energy rapidly in the case of use by triggering by a trigger 35. In the example shown, the drive spring 34 is indirectly connected to the moving contact 21 via a switch 36, which may comprise, for example, a lever arm or the like mounted on a shaft, but embodiments are also conceivable in which the drive spring 34 is directly connected to the moving contact 21.
The spring-loaded drive 30 may comprise a further drive spring for switching off or on, if necessary for a plurality of switching actions in a time period shorter than the duration of the re-tensioning of the respectively triggered drive spring.
The spring-loaded drive 30 also has an electric auxiliary drive 31, which is designed to tension the drive spring 34 again after it has been triggered. In the embodiment shown here, the electric auxiliary drive 31 comprises an electric motor 32, which is connected or connectable to a drive spring 34 via a transmission 33.
The connection of the drive spring 34 and the electric auxiliary drive 31 can be achieved in a number of ways, in a manner known in the art. For example, the transmission 33 can be connected to a lever which is rotated by the transmission and has a spring opening into which the drive spring is hooked. By rotation of the lever, the drive spring is tensioned (or compressed, collectively referred to as "tensioned" in the scope of the present invention) and thus applies spring energy.
The spring-loaded drive of the embodiment of fig. 1 also has a measuring and/or control unit 37 which is designed to drive a trigger 35 for triggering the drive spring 34 and subsequently activate the electric auxiliary drive 31 or the motor 32 to again tension the drive spring 34. The trigger 35 may, for example, comprise a mechanical obstruction of the transmission 33, which is released by the trigger, thereby activating the operation of the transmission and releasing the drive spring.
The measuring and/or control unit 37 is shown in fig. 1 as a single unit which is part of the spring energy storage drive 30, but can also be realized as a distributed arrangement consisting of, for example, a measuring unit and a remotely located control unit. In this case, the measuring unit may be arranged in a spring-loaded drive and the control unit may be arranged in a digital protection device in the medium voltage switchgear or in a remote location, such as a control center. The illustrated function of the control unit may also be divided into a plurality of units. For example, the actuation of the trigger 35 can be performed by a unit arranged in the spring-loaded drive 30, whereas the evaluation of the measured values described below can be performed in a further, in particular remote, unit.
The measuring unit and/or the control unit 37 is designed to measure the drive current of the electric auxiliary drive 31 during the tensioning of the drive spring 34 and to infer the state of the spring-loaded drive 30 and/or of certain components of the spring-loaded drive 30 from the measured drive current. The result of this evaluation can be output as a maintenance signal to a signal receiver 38 to indicate the extent of the need for maintenance measures and, if necessary, the components of the spring energy storage drive 30 that need maintenance, the signal receiver 38 being, for example, a display of the medium-voltage switching device 10 or also a remote control center.
Fig. 2 shows an example of the time course of the drive current I of the electric auxiliary drive 31 of the spring-loaded drive 30, which can be measured, for example, by the measuring unit and/or the control unit 37 of the embodiment shown in fig. 1. In a typical application, the typical time course of the drive current shown extends over a period of less than 10 seconds, for example over a period of 3 to 5 seconds. At time point t 0 The electric auxiliary drive is activated and then increased at a rate limited by the inductance of the motor windings of the motor 32 until a point in time t 1 Very high drive currents occur. The rapidly increasing drive current creates a magnetic field in the motor windings, which is the cause of motor motion. At time point t 1 The motor 32 starts to rotate, whereby the generation effect of the rotation generates a reverse voltage that acts against the above-described cause, and therefore, at a time point t as the motor 32 1 The rotation is started and the drive current is reduced again. After the start-up of the motor 32, the drive current is reduced so as to reach a point of time t 2 Which means the motor 32 is operated without mechanical load, i.e. before the tensioning operation starts, remaining on the platform. The current consumed during this period is necessary to overcome losses in the motor 32, the gear train 32, and other moving parts connected to the motor 32. Thus, the drive current measurement measured during the stage contains information about the state of the mentioned component.
From time point t 2 Initially, the drive current is increased again so as to be at the time point t 3 Reaching a (local) maximum. The increase in drive current is caused by the additional torque required to tension the drive spring 34. Thus, at time t 2 The actual start of the drive spring 34From this point in time, the spring energy is introduced into the drive spring 34 by the electric auxiliary drive 31. The drive spring 34 is further tensioned until at the point in time t 4 The electric auxiliary drive 31 is deactivated. This point in time can be determined in particular by the position of the drive spring 34 or a component mechanically connected to the drive spring 34, for example the motor 32 itself. For example, the auxiliary switch may be operated directly or indirectly by the drive spring 34 when the auxiliary switch has reached a predetermined end position, whereby the drive circuit of the electric auxiliary drive is interrupted by the auxiliary switch. However, it is also conceivable to select the time t fixedly for a given spring energy storage drive 4 And for the operation of the medium voltage switchgear it is assumed that at this point in time the drive spring 34 is sufficiently tensioned.
At time point t 4 After disabling the electrically assisted driver, the driving current drops rapidly until at time t 5 Becomes zero. During this time, a current flowing (e.g. a current maintained through the inductance of the motor winding) may flow in the arc in the auxiliary switch mentioned until the motor winding is demagnetized.
The control unit 37 may measure the drive current of the electric auxiliary drive 31 in different ways. For example, in a particularly simple embodiment, the electric auxiliary drive may be activated at a predetermined point in time, for example at an expected point in time (point in time t in fig. 2) corresponding to the occurrence of a (local) maximum of the drive current 3 ) Time t of (2) 3 The drive current is measured only once. If the value of the drive current measured at this point in time deviates from the expected value, this may indicate, for example, fatigue of the drive spring (less drive current is required to tension the drive spring), an increase in friction losses in the motor and/or the transmission (more drive current is required to tension the drive spring), an increase in mechanical play in the auxiliary motor (until a local maximum is reached later), and other aging effects. Since some of these effects are opposite, they may be masked when they occur simultaneously, so it is advantageous to repeat the measurement.
For example, the measurements may be repeated periodically, approximately at least once every 50 milliseconds. In a practical embodiment, the drive current is measured at 1 millisecond and less, for example at a sampling frequency of 8 kilohertz.
However, as an alternative to a single or periodic measurement, the drive current may also be measured a plurality of times non-uniformly over time, i.e. in the presence of one or more signals denoted t 1 To t 5 Is performed at a desired time point of the characteristic time points of (a). For example, at time t of FIG. 2 1 And t 2 Time point t of high probability in between 2 Measurement to obtain a measurement value indicative of the no-load operation of the electric auxiliary drive 31. Subsequently, it can be located at the time point t of fig. 2 2 And t 4 Time point t between 3 ' re-measure to obtain a measured value from which the amount of tensioning work applied by the electric auxiliary drive 31 is obtained. This method is easy to perform but it already provides a more reliable detection of different ageing effects with respect to a unique measurement of the drive current.
It is also possible to perform a series of measurements during a period of time around an expected point in time at which the characteristic point in time to be considered for a particular embodiment of the operating method according to the invention occurs, and then to interrupt the measurements until the next (expected) characteristic point in time is imminent. Then, in each measurement series, the respective maximum or minimum value with the associated measurement time point can be regarded as the actual characteristic time point and used for evaluation. The drive current is measured with respect to a continuous or periodic measurement, whereby the number of measurements and the data to be processed for evaluation are reduced, but a similar reliability of the aging effect detection in a spring-loaded drive is still achieved.
In fig. 2, the area of the drive current that runs down in time corresponds to the integral of the drive current, which in turn represents the total energy for tensioning the drive spring. This integration can be broken down into two parts, which are represented in fig. 2 by different shading, wherein part I (the first part of the integration of the drive current) represents the spring energy actually introduced into the drive spring, and part II (the second part of the integration of the drive current) represents losses in the motor 32, the transmission 33, etc. By from time point t 2 Initially, only the drive current is considered for part I at time point t 2 The part above the instantaneous value of the drive current until the current is again below this instantaneous value or until the electric auxiliary drive is deactivated, thus distinguishing part I from the rest of the parts.
For evaluation, the integral and/or various parts of the integral may be considered. The integrals or parts thereof may also be proportional to each other and taken into account in the evaluation.
Regardless of the evaluation details of the embodiment of the method according to the invention, an evaluation data record is created here, which describes the current state of the spring-loaded drive as convincingly as possible and is then compared with an expected value, for example an old evaluation data record, a corresponding data record obtained in an initial measurement during the production of the spring-loaded drive or a typical data record for the type of construction of the spring-loaded drive. Depending on the result of the comparison, a maintenance signal may then be output. For example, the necessity of maintenance measures may be indicated when the evaluation data set or individual data of the evaluation data set deviate from the expected exceeding of a predetermined fault tolerance. According to an embodiment variant of the method, the type of possible faults and/or the components involved can also be signaled by a maintenance signal.
Fig. 3 shows an exemplary embodiment of a method according to the invention for operating a spring-loaded drive. The method starts in a start step S0 and then proceeds to step S1, in which step S1 an electric auxiliary drive is activated. After the activation of the electric auxiliary drive, step S2 is repeated, in which step S2 the drive current of the electric auxiliary drive is measured while the drive spring of the spring energy storage drive is tensioned. The time course of the drive current is thus measured.
It is noted here that it is in principle not important whether the measurement of the drive current starts at the same time as the activation of the electric auxiliary drive, before or after the activation, or completely independently of the start of the activation. In this regard, fig. 3 is merely for illustration of an embodiment and a better understanding of the present invention.
In step S3, the integral of the drive current is determined. This step can also be performed in parallel with step S2 by continuously accumulating the individual measured values instead of after measuring the entire time course as shown in fig. 3. Then, a first part of the integral explained with respect to fig. 2 is determined in step S4, and a second part of the integral is determined in step S5. Of course, the order of steps S4 and S5 may be interchanged. The amount of the integral, the first part of the integral and the second part of the integral can also be determined by summing or differencing the other two parameters. In step S6, an evaluation data set is created, which may contain any combination of measured values, integrals, parts thereof and/or proportional relations thereof, even only one of the parameters. In step S7, the evaluation data set is compared with the expected value, and finally in step S8, depending on the result of the comparison, a maintenance signal is output before the method reaches the end of the next tensioning of the drive spring in the end step S9. Based on the maintenance signal, appropriate maintenance measures can be planned and the operation of the medium-voltage installation can be temporarily stopped at an advantageous point in time when the maintenance measures are performed.
The invention is described in more detail with reference to the drawings of an embodiment. The examples do not limit the scope of the invention, which is defined solely by the claims, but are only for better understanding of the invention.
List of reference numerals
10. Medium voltage switchgear
20. Switch
21. Mobile contact
22. Mating contact
30. Spring energy storage type driver
31. Electric auxiliary driver
32. Motor with a motor housing having a motor housing with a motor housing
33. Transmission mechanism
34. Driving spring
35. Trigger device
36. Converter
37 measuring unit, control unit
38 signal receiver
Claims (12)
1. A method for operating a spring-loaded drive (30) of a medium-voltage switching device (10), comprising the following steps:
-measuring a drive current of an electric auxiliary drive (31) for tensioning a drive spring (34) of a spring energy storage drive (30) of the medium voltage apparatus (10);
-tensioning the drive spring (34) with the electric auxiliary drive (31);
-creating an evaluation data set from the measured drive current;
-comparing the evaluation data set with an expectation; and
-outputting a maintenance signal depending on the comparison result.
2. Method according to the preceding claim, wherein in the step of measuring the drive current the time profile of the drive current is measured and the evaluation data set is created from the measured time profile of the drive current.
3. Method according to the preceding claim, wherein an integral of the time course of the drive current is determined in the step of creating the evaluation data set.
4. Method according to the preceding claim, wherein a first part of the integral is determined, the first part representing the tensioning work done by the auxiliary drive.
5. The method according to any of the two preceding claims, wherein a second part of the integration is determined, the second part representing a drive loss of the auxiliary drive (31).
6. The method according to the two preceding claims, wherein the first and second parts of the integral are in proportional relationship to each other.
7. The method according to any of the preceding claims, wherein in case of creating the evaluation data setAt least one characteristic point in time (t 1 ，t 2 ，t 3 ，t 4 ，t 5 ) And in the step of comparing the evaluation data sets, at least one characteristic point in time (t 1 ，t 2 ，t 3 ，t 4 ，t 5 ) And/or at least one characteristic point in time (t 1 ，t 2 ，t 3 ，t 4 ，t 5 ) The measured drive current is compared with an expected value, which is compared with at least one characteristic point in time (t 1 ，t 2 ，t 3 ，t 4 ，t 5 ) And (5) associating.
8. Method according to the preceding claim, wherein at least one characteristic point in time (t 1 ，t 2 ，t 3 ，t 4 ，t 5 ) Is selected from the following time points: -a start of a current through the auxiliary driver (31), -a start of tensioning of the drive spring, -an occurrence of a local or global maximum of the drive current, -a turn-off time point of the auxiliary driver (31) and-an end of a current through the auxiliary driver (31).
9. The method according to any of the preceding claims, wherein the expectations are historical data sets or predefined data sets specific to the type of spring-loaded drive.
10. Spring-loaded drive (30) for a medium-voltage switching device (10), having an electric auxiliary drive (31) designed for tensioning a drive spring (34) of the spring-loaded drive (30), and having a measuring unit (37) designed for measuring a drive current of the auxiliary drive (31) and for transmitting the measurement result to a control unit (37) for carrying out the method according to any of the preceding claims.
11. Medium voltage switchgear (10) having a switch (20) with a moving contact (21) and a spring-loaded actuator (30) according to the preceding claim, which is designed to move the moving contact (21) of the switch (20) in accordance with a control signal.
12. A data storage with a computer program which is implemented by a control unit (37) of a medium voltage switchgear (10), a digital protection device or a remote control center, a control unit (37), such as a spring-loaded drive (30), and which executes the method according to any of claims 1 to 9.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020209017.3A DE102020209017A1 (en) | 2020-07-20 | 2020-07-20 | Error detection in spring storage systems of medium-voltage circuit breakers |
| DE102020209017.3 | 2020-07-20 | ||
| PCT/EP2021/065379 WO2022017675A1 (en) | 2020-07-20 | 2021-06-09 | Fault detection in spring-loaded drives of medium-voltage switchgear systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116137926A true CN116137926A (en) | 2023-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180060059.8A Pending CN116137926A (en) | 2020-07-20 | 2021-06-09 | Fault detection in a spring-loaded drive of a medium-voltage switching device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230335350A1 (en) |
| EP (1) | EP4154287A1 (en) |
| CN (1) | CN116137926A (en) |
| DE (1) | DE102020209017A1 (en) |
| WO (1) | WO2022017675A1 (en) |
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| DE102020216013A1 (en) | 2020-12-16 | 2022-06-23 | Siemens Aktiengesellschaft | Monitoring of power electrical equipment |
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| DE102011089039B4 (en) * | 2011-12-19 | 2022-10-13 | Carl Zeiss Industrielle Messtechnik Gmbh | Coordinate measuring machine and method for operating a coordinate measuring machine |
| US10012697B2 (en) | 2015-08-13 | 2018-07-03 | Eaton Intelligent Power Limited | Failure prediction device and method for vacuum circuit breakers |
| DE102016218334B4 (en) * | 2016-09-23 | 2020-03-05 | Siemens Aktiengesellschaft | Motor device for a switch drive of an electrical switch |
-
2020
- 2020-07-20 DE DE102020209017.3A patent/DE102020209017A1/en active Pending
-
2021
- 2021-06-09 US US18/006,192 patent/US20230335350A1/en active Pending
- 2021-06-09 EP EP21735174.1A patent/EP4154287A1/en active Pending
- 2021-06-09 CN CN202180060059.8A patent/CN116137926A/en active Pending
- 2021-06-09 WO PCT/EP2021/065379 patent/WO2022017675A1/en unknown
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|---|---|
| WO2022017675A1 (en) | 2022-01-27 |
| US20230335350A1 (en) | 2023-10-19 |
| EP4154287A1 (en) | 2023-03-29 |
| DE102020209017A1 (en) | 2022-01-20 |
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